I have downloaded an app onto my Samsung Galaxy Portal which allows me to see my Gdocs on my phone. I have then uploaded the spreadsheet i have been using to assess my classes. Now it is in Gdocs i can view it on the mobile, and edit the spreadsheet on the phone. This means that i can be looking at students work and then recording the assessment or a comment as i am giving them feedback. It also means that i can easily show students where they are at, and the progress they are making.

I think this gives me the functionality i was looking for in a mobile gradebook app.

What, if anything, do you use to record assessments on mobiles?